MIMO Antenna Array Beamforming for Cluster Interference Mitigation
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Solution Overview
Problem
Conventional wireless broadband networks face high costs and interference issues due to the need for separate transmission equipment and antennas for access and backhaul networks, with limited frequency diversity and modulation flexibility, leading to capacity constraints and increased latency.
Innovation Solution
The implementation of a point-to-point communication system using omni-directional or directional antennas with MIMO capabilities, dynamic beam forming, and interference mitigation mechanisms, allowing for concurrent transmissions and adaptive modulation and coding to improve spectral efficiency and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate transmission equipment and infrastructure are used for access and backhaul networks, then network functionality is ensured, but deployment cost increases
Solution Approach 1:
The patent combines access and backhaul transmission functions into a single integrated system. The base station uses the same antenna array for both access communication with mobile terminals and backhaul communication with other base stations, eliminating the need for separate transmission equipment and reducing deployment costs while maintaining both network functionalities
Solution Approach 2:
The base station is designed with multi-functionality to perform both access and backhaul operations simultaneously. The antenna array and transmission equipment serve dual purposes: communicating with mobile terminals in the access network and establishing point-to-point links with other base stations for backhaul, making the system versatile and cost-effective
2Area of stationary object
If high power transmission is used to maximize coverage area, then coverage is improved, but interference with neighboring cells increases
Solution Approach 1:
The patent applies local quality by using directional beamforming to concentrate transmission energy in specific directions rather than omnidirectionally. Each base station transmits signals focused toward its intended recipient (access terminal or backhaul partner), providing strong local coverage while minimizing interference in other directions, thus resolving the contradiction between coverage and interference
Solution Approach 2:
The system dynamically adjusts beam directions and transmission characteristics based on real-time conditions. The base station can switch between different beamforming configurations to serve access terminals in different directions and establish backhaul links as needed, optimizing coverage while managing interference dynamically rather than using fixed high-power omnidirectional transmission
3Device complexity
If limited frequency diversity is used in point-to-point communication, then system complexity is reduced, but capacity is constrained
Solution Approach 1:
The patent introduces spatial dimensionality to point-to-point communication by using an antenna array with multiple elements. Instead of relying solely on frequency diversity, the system exploits spatial diversity through directional beamforming and multiple antenna paths, adding a new dimension to the communication channel that increases capacity without significantly increasing system complexity
Solution Approach 2:
The system changes communication parameters by implementing adaptive modulation and coding schemes that can be adjusted based on channel conditions. The base station can vary transmission parameters such as modulation order, coding rate, and beam direction to optimize capacity for each point-to-point link, enhancing network capacity while maintaining manageable system complexity
4Device complexity
If conventional antenna arrangements are used, then device complexity is minimized, but spectral efficiency is reduced
Solution Approach 1:
The patent implements dynamic beamforming where the antenna array continuously adapts its radiation pattern based on channel conditions and traffic requirements. The base station can form and steer beams dynamically toward different users and backhaul partners, maximizing spectral efficiency by concentrating energy where needed while keeping the physical antenna configuration relatively simple and manageable
Data Source
AI summary
A mobile broadband wireless system including at least two pairs of nodes arranged in a cluster, each pair coupled to form a link for wireless communication. Each node includes an RF transceiver with associated modem, an antenna array arrangement coupled to the modem and arranged for multiple concurrent transmissions, where each antenna has a beam pattern selected to improve quality of transmission, and a controller for controlling the transceiver, modem and antenna array arrangement for providing point to point communication. The controller allocates MIMO streams and modulation to different antennas in the antenna array arrangement, and implements at least one interference mitigation mechanism to minimize interference within the cluster during multiple concurrent transmissions. A method of wireless communication is also provided.